Betta spl. male crowntail yellow - Betta Fish for Sale UK

Yellow brings out something different in a crowntail. The strain's reduced webbing turns each fin into a fan of separate spiked rays, and in this colourway every ray glows yellow — a warm, high-visibility look that reads clearly even from across a room. These males reach about 6.5 cm and carry the crown across caudal, dorsal and anal fins alike.

Compared with some of our other crowntails, this line is recorded as semi-aggressive rather than fully aggressive — a useful distinction, though not a licence for a community tank. Small peaceful snails remain the safest companions, and peaceful shrimp may work in heavily planted tanks while accepting they may be eaten. The exclusions are non-negotiable: no other male bettas, no fin-nippers such as tiger barbs, no aggressive or territorial species, no large predators, and no long-finned fish that trigger rivalry displays. He needs a 38-litre aquarium or larger, water at 24–30 °C, pH between 6.0 and 7.5 and hardness from 1 to 15 dGH, and he will spend his time in the upper region of the tank where the yellow shows best. Moderate care overall — stable warmth and clean water are the whole job.

Yellow fish fade when stressed, which conveniently turns his colour into a daily wellbeing report. Strong, even yellow from body to ray tips signals all is well; washed-out patches say check the water before anything else. Keep that water at 24–30 °C, pH 6.0–7.5, hardness 1–15 dGH, and the maintenance habit becomes a five-minute glance. His semi-aggressive grading is the gentler of the crowntail temperaments we list, but the strain's delicate rays still rule out boisterous company regardless of disposition — the 38-litre minimum is best spent on him alone plus a snail clean-up crew. A carnivore menu with some variety keeps the yellow dense across his expected three years.

Care file: yellow crowntail

• Maximum length ~6.5 cm
• Three-year typical lifespan
• Moderate care level
• Semi-aggressive character
• Heat: 24–30 °C
• pH range 6.0–7.5
• Hardness 1–15 dGH
• Tank from 38 litres
• Diet: carnivorous
• Upper-level territory

Ordering information

Strong yellows are scarcer than reds and blues in crowntail form, so this listing tends to move quickly when in stock. Your fish is despatched with a licensed live-animal courier, insulated for UK weather, and covered by our live arrival guarantee.